Quote Originally Posted by Belisario
I also think that remove certain crappy units could benefit the AI, what is your opinion?
Probably, yes. VikingHorde's XL Mod removed peasants from the game, which definitely helped the AI factions somewhat. In addition, factions in XL can train better units right away (FMAA, FS, etc.) due to everyone (including the human player) starting with a higher level of infrastructure -- and so the AI trains fewer UM and vanilla spearmen as a result.